如何强制Scala使用不同的库版本？

Question

加入

libraryDependencies += "org.scalatest" %% "scalatest" % "3.0.0" % "test" 

到build.sbt，并刷新该项目后，我得到了这条消息。

SBT project import

[warn] Multiple dependencies with the same organization/name but different versions. To avoid conflict, pick one version:

[warn] * org.scala-lang.modules:scala-xml_2.11:(1.0.5, 1.0.4)

Changing the above到

libraryDependencies ++= Seq(
    "org.scalatest" %% "scalatest" % "3.0.0" % "test" 
    exclude("org.scala-lang", "scala-reflect") 
    exclude("org.scala-lang.modules", "scala-xml_2.11") 
) 

解决了这个问题。但是，我不想从scalatest中排除scala-xml_2.11版本1.0.5，我想force the scala compiler使用scala-xml_2.11版本1.0.5而不是版本1.0.4。 （我研究了在版本https://mvnrepository.com）。因此我尝试了

libraryDependencies ++= Seq(
    "org.scala-lang" % "scala-reflect" % "2.11.8", 
    "org.scala-lang.modules" % "scala-xml_2.11" % "1.0.5" 
) 

然而这导致

SBT project import

[warn] Binary version (2.11) for dependency org.scala-lang#scala-reflect;2.11.8

[warn] in default#myproject$sources_javadoc_2.10;1.0 differs from Scala binary version in project (2.10).

[warn] Binary version (2.11) for dependency org.scala-lang#scala-library;2.11.8

[warn] in default#myproject$sources_javadoc_2.10;1.0 differs from Scala binary version in project (2.10).

[warn] Multiple dependencies with the same organization/name but different versions. To avoid conflict, pick one version:

[warn] * org.scala-lang:scala-library:(2.11.8, 2.10.4)

[warn] * org.scala-lang:scala-reflect:(2.11.8, 2.10.4)

[warn] [FAILED ] com.artima.supersafe#supersafe_2.10.4;1.1.0!supersafe_2.10.4.jar(src): (0ms)

[warn] ==== local: tried

[warn]
/home/user/.ivy2/local/com.artima.supersafe/supersafe_2.10.4/1.1.0/srcs/supersafe_2.10.4-sources.jar

[warn] ==== activator-local: tried [warn] /Development/Activator/activator-dist-1.3.10/repository/com.artima.supersafe/supersafe_2.1... (show balloon)

那我该怎么办代scalaVersion := "2.11.8"？

编辑：还有什么我尝试和没有工作：

scalaVersion := "2.11.8" 

libraryDependencies ++= Seq(
    "org.scala-lang" % "scala-reflect" % scalaVersion.value, 
    "org.scala-lang.modules" %% "scala-xml" % "1.0.5" 
) 

// ScalaTest 
libraryDependencies += "org.scalatest" %% "scalatest" % "3.0.0" % "test" 

[warn] Multiple dependencies with the same organization/name but different versions. To avoid conflict, pick one version: [warn] * org.scala-lang.modules:scala-xml_2.11:(1.0.5, 1.0.4)

---

scalaVersion := "2.11.8" 

libraryDependencies ++= Seq(
    "org.scala-lang" % "scala-reflect" % scalaVersion.value, 
    "org.scala-lang.modules" %% "scala-xml_2.11" % "1.0.5" 
) 

// ScalaTest 
libraryDependencies += "org.scalatest" %% "scalatest" % "3.0.0" % "test" 

Error:Error while importing SBT project:
...

[info] 
Resolving org.scala-sbt#run;0.13.8 ... [info] Resolving 
org.scala-sbt#task-system;0.13.8 ... [info] Resolving 
org.scala-sbt#tasks;0.13.8 ... [info] Resolving 
org.scala-sbt#tracking;0.13.8 ... [info] Resolving 
org.scala-sbt#cache;0.13.8 ... [info] Resolving 
org.scala-sbt#testing;0.13.8 ... [info] Resolving 
org.scala-sbt#test-agent;0.13.8 ... [info] Resolving 
org.scala-sbt#test-interface;1.0 ... [info] Resolving 
org.scala-sbt#main-settings;0.13.8 ... [info] Resolving 
org.scala-sbt#apply-macro;0.13.8 ... [info] Resolving 
org.scala-sbt#command;0.13.8 ... [info] Resolving 
org.scala-sbt#logic;0.13.8 ... [info] Resolving 
org.scala-sbt#precompiled-2_8_2;0.13.8 ... [info] Resolving 
org.scala-sbt#precompiled-2_9_2;0.13.8 ... [info] Resolving 
org.scala-sbt#precompiled-2_9_3;0.13.8 ... [trace] Stack trace 
suppressed: run 'last *:update' for the full output. [trace] Stack 
trace suppressed: run 'last :ssExtractDependencies' for the full 
output. [error] (:update) sbt.ResolveException: unresolved 
dependency: org.scala-lang.modules#scala-xml_2.11_2.11;1.0.5: not 
found [error] (*:ssExtractDependencies) sbt.ResolveException: 
unresolved dependency: 
org.scala-lang.modules#scala-xml_2.11_2.11;1.0.5: not found [error] 
Total time: 4 s, completed 01.10.2016 17:46:55

---

scalaVersion := "2.11.8" 

libraryDependencies ++= Seq(
    "org.scala-lang" % "scala-reflect" % scalaVersion.value, 
    "org.scala-lang.modules" %% "scala-xml" % "1.0.5" 
) 

// ScalaTest 
libraryDependencies ++= Seq(
    "org.scalatest" %% "scalatest" % "3.0.0" % "test" 
    exclude("org.scala-lang", "scala-reflect") 
    exclude("org.scala-lang.modules", "scala-xml") 
) 

[warn] Multiple dependencies with the same organization/name but different versions. To avoid conflict, pick one version: [warn] * org.scala-lang.modules:scala-xml_2.11:(1.0.5, 1.0.4)

我的build.sbt

name := "MyProject" 
version := "0.1.0" 
scalaVersion := "2.11.8" 

libraryDependencies ++= Seq(
    "org.scala-lang" % "scala-reflect" % scalaVersion.value, 
    "org.scala-lang.modules" %% "scala-xml" % "1.0.5" 
) 

// ScalaTest 
//libraryDependencies += "org.scalactic" %% "scalactic" % "3.0.0" 
//libraryDependencies += "org.scalatest" %% "scalatest" % "3.0.0" % "test" 
libraryDependencies ++= Seq(
    "org.scalatest" %% "scalatest" % "3.0.0" % "test" 
    exclude("org.scala-lang", "scala-reflect") 
    exclude("org.scala-lang.modules", "scala-xml_2.11") 
) 

Answer 1

不要替代;您需要scalaVersion和libraryDependencies。 虽然使用

scalaVersion := "2.11.8" 

libraryDependencies ++= Seq(
    "org.scala-lang" % "scala-reflect" % scalaVersion.value, 
    "org.scala-lang.modules" %% "scala-xml" % "1.0.5" 
) 

避免的错误，当你最终改变scalaVersion。

通过删除scalaVersion你会得到默认scalaVersion := "2.10.4"（至少与你的SBT的版本/设置），但你的libraryDependencies仍然需要2.11。

Answer 2

排除特定的传递依赖的方式是这样的：

1. 运行sbt evicted找出哪些项目依赖的过时的库拉，让我们假设有问题的图书馆是：com.typesafe.slick。

2. 添加下列排除（括号很重要）：

   ("com.typesafe" %% "slick" % "3.1.1").exclude("org.scala-lang.modules", "scala-xml_2.11")

   通常添加为您将上市的依赖。

3. 这将防止sbt包含任何版本的scala-xml作为Slick的传递依赖项进入。